Abstract: The multi-projects attitude maneuver problem for ASSAT(agile small satellite) with VSCMGs(variable speed control moment gyros) as actuator was investigated. Under some limits, such as, the saturation of actuators, the requirement of attitude maneuver, the measurement and tracking ability of sensors, a nonlinearly integrating power and attitude controller was designed. The quaternion drift resulting from frequent maneuver was tuned. A VSCMGs steering law was provided. According to the singularity indicator of configuration, the steering tasks including singularity avoidance and wheel speed equalization were assigned soundly. Two corresponding methods were designed. The law was switched form one method to another if the indicator reached the defined condition. A numerical example for the IPACS(integrated power and attitude control system) with VSCMGs of pyramid configuration was given. The simulating results show that the ASSAT is able to satisfy simultaneously the requirements of the rapid speed attitude maneuver and stability, as well as the energy control and wheel speed equalization.